Pneumatic cast iron pipe centrifugal casting machine mold braking device

Abstract

The invention discloses a pneumatic cast iron pipe centrifugal casting machine mold braking device. The device comprises a brake metal block, a brake transmission part and a brake power part, whereinone end of the brake transmission part is connected with the brake metal block, and the other end of the brake transmission part is connected with the brake power part; the brake transmission part comprises a transmission lever and a lever supporting base, the transmission lever is mounted on the lever supporting base through a hinge pin, the transmission lever is of an L-shaped structure and comprises a horizontal rod and a vertical rod which are integrally formed, and the free end of the vertical rod is fixedly connected with the brake metal block located thereon; and the brake power part comprises a trunnion cylinder and a cylinder supporting base, the upper end of the trunnion cylinder is mounted on a lug plate at the tail part of a horizontal rod of the transmission lever through a hinge pin, and the trunnion cylinder is connected with the cylinder supporting base through a trunnion thereof. According to the device, targeted, simple and efficient braking can be carried out on a high-speed rotating cast pipe mold, abrasion of key parts of the cast pipe mold is reduced, and the service life of the cast pipe mold is prolonged.

Description

technical field [0001] The invention belongs to the technical field of centrifugal casting equipment for cast iron pipes, in particular to a mold braking device for a pneumatic centrifugal casting machine for cast iron pipes. Background technique [0002] The braking device of the traditional cast iron pipe centrifugal casting equipment is an electromagnetic brake type braking device for the main engine motor pulley. This type of braking device has the following disadvantages: [0003] 1. The brake-type braking method is to reduce the rotation speed of the driving supporting wheel by acting on the motor pulley, and then reduce the speed through friction between the driving supporting wheel at low speed and the high-speed rotating cast pipe mold. However, the friction part between the driving roller and the cast pipe mold is the "roller table" part of the cast pipe mold. Long-term friction will cause stress damage on the surface of the cast pipe mold, so that the mold rotates...

AI Technical Summary

Problems solved by technology

However, the friction part between the driving roller and the cast pipe mold is the "roller table" part of the cast pipe mold. Long-term friction will cause stress damage on the surface of the cast pipe mold, so that the mold rotates at a high speed in the "casting" state. The beating is intensified, which not only reduces the service life of equipment and molds, but also indirectly affects the quality of centrifugal casting pipes

[0004] 2. The effective mechanism of electromagnetic brake braking has high conduction loss, complex structure, and cumbersome on-site debugging

[0005] 3. The on-site environment of centrifugal casting of cast iron pipes is relatively harsh, high temperature, high humidity, and metal powder lead to hidden dangers in the stability of the operation effect of the electromagnetic brake mechanism

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